Safety Danny McCray (ankle), receiver Andre Holmes (hamstring) and nose tackle Josh Brent (knee) sat out the start of practice. But linebacker DeMarcus Ware (stinger) and center Phil Costa (concussion) were back on the field.
Cowboys coach Jason Garrett said Costa could play Saturday against the Bucs.
"We’ll see," Garrett said. "He has had no symptoms since the ball game. We’ve gone through the protocol. He’s on schedule. He didn’t do anything the last couple of days, but we intended that right from the start. He is on schedule to be able to play if he responds here in the next couple of days."
Still, Garrett concedes that undrafted rookie Kevin Kowalski could start. Kowalski replaced Costa against the 49ers for 19 plays after Costa injured his knee. Kowalski also played nine plays at left guard against New England after Bill Nagy fractured an ankle.
"Kowalski could start," Garrett said. "Again, we’re monitoring here. We’ll see how he [Costa] does in practice today and tomorrow and how he responds to all his work."
-- Charean Williams